Sea
I love bicycle crunches, it's one of my favorite exercises.
我建議做這兩個動作時都交叉雙腿。做普通卷腹時，將手肘貼近膝蓋。做自行車捲腹時，將左手肘貼近右膝蓋，右手肘靠近左膝蓋。
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評論 2
- Jim Wattier
Good for those abdominal muscles!